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Square D QOB340-1021 - 3-Pole 40A Bolt-On Circuit Breaker (120/240VAC)

Square D
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The Square D QOB340-1021 is a three-pole, bolt-on molded case circuit breaker from the QOB Series, designed for overcurrent protection in commercial and industrial power distribution systems. It is rated for 120/240VAC with a 10kA interrupting capacity at 120V, and features a pressure plate terminal connection for secure wiring. This unit weighs 5.19 lb and is constructed for bolt-on mounting, ensuring a stable installation within compatible panelboards. It is UL Listed and CSA certified, meeting rigorous safety and performance standards for branch circuit protection. Typical applications include protecting feeders and equipment in three-phase lighting, appliance, and motor control panels.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, QOB Series, Bolt-On Mounting
  • Voltage Rating: 120/240VAC
  • Current Rating: 40A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 10kA@120V
  • Connection: Bolt-On
  • Terminal Connection: Pressure Plate
  • Weight: 5.19 lb
  • Standards: UL Listed, CSA
  • Installation Type: Bolt-On
  • Breaker Frame: QOB


Product Identification
  • UPC: 078590149442
  • GTIN: 00785901494423